Look at Google's insane little dog robot. (Seriously, you have to check this thing out.)

In December 2013, Google bought Boston Dynamics, an engineering company that creates mind-blowing mobile research robots for the military. At the time, the company featured nine robots on its website.

But now there's a new addition to the Boston Dynamics' family, which the company demo'd in a YouTube video: Spot, a smaller, 160-pound bot that can move faster than its predecessor, Big Dog, traverse rough terrain, and withstand tough-looking kicks.

Boston Dynamics

Here it is walking up stairs:

Boston Dynamics

And running:

Boston Dynamics

Uphill? No problem:

Boston Dynamics

Downhill? Again, no problem:

Boston Dynamics

Watch the full video here:

Now, meet some of the other amazing (and kind of creepy) robots that Boston Dynamics has created:

Atlas is a humanoid robot that can walk through rough terrain like a human and even climb using its hands. It can lift and carry things, and it has cameras and a laser range finder on its head. When hit from the side, the robot manages to keep its balance.

Check out Atlas in action:

'Cheetah: The Fastest Robot In The World'

Boston Dynamics
The Cheetah set a record for speediest robot. It can run faster than 29 mph, destroying the previous record, set in 1989 at MIT, of 13.1 mph. That's faster than Jamaican sprint champion Usain Bolt.

The Cheetah is powered by an off-board hydraulic pump, meaning that it can't operated untethered.

RiSE is six-legged robot that can climb up vertical terrains like walls, trees, and fences using its micro-claws. The robot uses its tail to help it balance and can change its posture to conform to the curvature of the climbing surface. RiSE is 0.25 meters long, weighs 2 kilograms, and travels 0.3 meters per second.